Cisco had ignored the problem for months and Lynn's speech came as a total surprise to the community at large. Cisco had attempted to subvert the announcement a month prior to the speech by releasing a fix and not telling anyone about the severity of the problem. However, this is Black Hat, where full disclosure is king.

“

This is (a scenario in which) the network is down, and it's down in a way that it's not getting up again. How do you ship the patch when the network won't (be up so you can distribute it)? Are you going to mail out a CD? But there's no CD drive.

„

—Michael Lynn, to Wired about the severity of the bug.

This flaw was especially problematic because:

Cisco hadn't had the time to distribute/make it clear to people that their patch covered a critical security flaw, and

Mike had quit his job at Internet Security Systems (ISS) a mere hour before his speech. ISS had been pressured by Cisco and its own customers to fire Michael Lynn if he made the speech. Black Hat had done their best to discourage him as well. Cisco and ISS even banded together to produce an alternative speech that would expose a little less of Cisco's systems in the process.

Michael was reluctant at first to announce his findings, going into a schpiel about VOiP networks and getting booed by hackers who were now expecting the original speech with the announcement of Micheal's resignation from his company. With a little more prodding, he launched into his speech about the router exploit.

In short, Mike had gone PERP a mere week before the major hacker conference in the world. Frenzied security faggots were on their cell phones in seconds, trying to fix the problem before hackers on steroids could raid and pillage their networks. Cisco was embarrassed in a very public fashion and swore revenge.

Lynn could hardly anticipate the shitstorm about to be unleashed upon him. His lawyer arrived at the conference a short while after Michael gave the speech, and the first thing Michael told her is that he anticipated a lawsuit.

Cisco bawwed at the top of its lungs after the speech. First, they appealed to the security people, asking them to understand their point of view. They then ran to the FBI, saying that Lynn's speech had constituted a criminal breach of security and was going to cost Cisco millions in the long run.

Michael Lynn was forbidden from speaking at future Black Hats and Defcons, a ban later rescinded as Cisco attempted to make nice during the backlash created after people began rushing to Lynn's side. Cisco would later invite him to their pre-Black Hat 2006 party.